TY - JOUR AU - Criado, Francisco AU - Meladze, Gamlet AU - Odisehlidze, Nana TI - An optimal control problem for Helmholtz equation with non-local boundary conditions and quadratic funtional JO - Revista de la Real Academia de Ciencias Exactas, FĂ­sicas y Naturales PY - 1997 SP - 65 EP - 69 VL - 91 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RRACEFN_1997_1997_1_a7/ LA - en ID - RRACEFN_1997_1997_1_a7 ER -